{"product_id":"wilwood-adjustable-proportioning-valve-silver-fine-thread-knob-100-1000-psi-precision","title":"Wilwood Adjustable Proportioning Valve Silver — Fine-Thread Knob, 100–1000 PSI Precision","description":"\u003cp\u003e\u003cstrong\u003eWilwood 260-8419 is a compact, forged-billet adjustable proportioning valve with a fine-thread knob that lets you precisely meter brake line pressure between 100–1000 PSI.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eEngineered for performance vehicles and track-driven street cars, this next-generation proportioning valve delivers strong construction, a wide adjustment range and very fine control for dialing front\/rear braking balance. The compact, lightweight design mounts easily in tight engine bays or behind panels, and it ships with inverted-flare fittings to work with most domestic hard brake lines. This description explains what it does, how to use it, and why its features matter when you need repeatable, adjustable braking response.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the knob let me adjust brake balance on the fly?\u003c\/h3\u003e\n\u003cp\u003eThe finely threaded adjuster knob converts small turns into predictable pressure changes, allowing gradual decreases to rear-line pressure so you can tune bias without swapping components. Adjustment covers 100–1000 PSI with up to a 57% maximum reduction in line pressure, giving a broad window for setup.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFine-thread knob for precise incremental changes\u003c\/li\u003e\n  \u003cli\u003ePressure span from 100 to 1000 PSI for coarse or subtle tuning\u003c\/li\u003e\n  \u003cli\u003eMaximum 57% pressure reduction available for rear-line adjustment\u003c\/li\u003e\n  \u003cli\u003eRepeatable settings useful for track sessions or load changes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat fittings and ports does the valve use, and will it fit my lines?\u003c\/h3\u003e\n\u003cp\u003eThe Wilwood valve features standard 1\/8-27 NPT inlet and outlet ports and includes two adapter fittings that convert to 3\/8-24 inverted-flare female. Those adapters are compatible with most domestic 3\/16\" hard brake lines right out of the box, simplifying installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStandard 1\/8-27 NPT inlet\/outlet ports\u003c\/li\u003e\n  \u003cli\u003eIncludes two 1\/8-27 NPT to 3\/8-24 inverted-flare female fittings\u003c\/li\u003e\n  \u003cli\u003eWorks with most domestic 3\/16\" hard brake lines without custom adapters\u003c\/li\u003e\n  \u003cli\u003eCompact footprint and two .25\" side mounting holes spaced 1.00\" for flexible placement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and compact is the 260-8419, and where can I mount it?\u003c\/h3\u003e\n\u003cp\u003eBuilt from forged billet aluminum, the valve balances strength with low mass—just 5.2 ounces—making it suitable for tightly packaged engine compartments or behind interior panels. Two 1\/4\" side mounting holes spaced 1.00\" apart provide a secure mounting footprint that fits many street and race installations.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eForged billet construction for strength and longevity\u003c\/li\u003e\n  \u003cli\u003eLightweight: 5.2 ounces for minimal added weight\u003c\/li\u003e\n  \u003cli\u003eTwo .25\" side mounting holes spaced 1.00\" for secure attachment\u003c\/li\u003e\n  \u003cli\u003eCompact form factor suited to tight or concealed installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow precise is the pressure control, and what performance scenarios benefit most?\u003c\/h3\u003e\n\u003cp\u003eThe valve’s adjustment range and fine-thread control make it ideal when you need repeatable braking bias: testing on track, matching brake feel after hardware changes, or tuning for varying loads. It doesn’t change braking system fundamentals but lets you proportionally reduce rear-line pressure to achieve desired balance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePrecise metering helps tune front\/rear bias across conditions\u003c\/li\u003e\n  \u003cli\u003eUseful for drivers who alternate between street and track setups\u003c\/li\u003e\n  \u003cli\u003eHelps compensate for differing pad compounds or rotor sizes\u003c\/li\u003e\n  \u003cli\u003eProvides quick, reversible adjustments without replacing parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Drivers and builders who want a compact, high-control proportioning solution—race teams, performance enthusiasts, and anyone fine-tuning brake bias. If you need dependable, repeatable pressure adjustment with straightforward installation and durable construction, the Wilwood 260-8419 offers a practical, tunable way to optimize braking balance without resorting to more invasive system changes.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What pressure range does the Wilwood 260-8419 cover?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It adjusts between 100 and 1000 PSI, allowing up to a 57% reduction in line pressure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does it include fittings for domestic hard lines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — two 1\/8-27 NPT to 3\/8-24 inverted-flare female fittings are included for most 3\/16\" lines.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":55170235498839,"sku":"B002G37IEA","price":66.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/wilwood-260-8419-front-view.jpg?v=1790425644","url":"https:\/\/britishgarage.co.uk\/products\/wilwood-adjustable-proportioning-valve-silver-fine-thread-knob-100-1000-psi-precision","provider":"British Garage","version":"1.0","type":"link"}